The invention concerns a temperature controlling device for controlling the temperature of transfer fluid intended to be injected into a living object. The device comprises a temperature controlling, hollow casing the casing being configured to partly enclose the longitudinal length of an injection tube. The hollow casing is further provided with a longitudinal casing slit extending along the casings longitudinal direction for releasable arrangement of the injection tube there through. The hollow casing further comprises an inner casing section displaying a longitudinal through-going hollow casing opening and an outer casing section at least partly surrounding the inner casing, wherein the configuration of the inner casing and the outer casing ensures that the longitudinally directed heat conductivity of the inner casing is higher then the radially directed heat conductivity of the outer casing. The invention also concerns a method for the assembly of an injection tube into the inventive device.
